【Haichuan Teahouse】Brain Series: Innovative ideas to find the area of an irregular quadrilateral

2021-11-05View Original

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How should we convert and utilize the condition ∠ADC=135°? Does anyone know? ?Question: As shown in the figure, in the quadrilateral ABCD, BE is perpendicular to CD, the vertical point E is on CD, AD=8, CE=6, BE=16, ∠ADC=135°, find the area of the quadrilateral ABCD.

Reply #22021-11-05

I'm trying to figure it out, but I don't know if it's right or not.

Reply #32021-11-06

I think it's right, a talented student~

Reply #42021-11-06

When people reach middle age and become bored, they start their life as a topic writer in a small town again;P

Reply #52021-11-06

I am no longer afraid of being laid off, I can now work as a tutor.

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【Haichuan Teahouse】Brain Series: Innovative ideas to find the area of ​​an irregular quadrilateral

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【Haichuan Teahouse】Brain Series: Innovative ideas to find the area of an irregular quadrilateral